2147839 has 2 divisors, whose sum is σ = 2147840. Its totient is φ = 2147838.

The previous prime is 2147801. The next prime is 2147843. The reversal of 2147839 is 9387412.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2147839 is a prime.

It is a super-2 number, since 2×2147839² = 9226424739842, which contains 22 as substring.

2147839 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2147869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1073919 + 1073920.

It is an arithmetic number, because the mean of its divisors is an integer number (1073920).

2^2147839 is an apocalyptic number.

2147839 is a deficient number, since it is larger than the sum of its proper divisors (1).

2147839 is an equidigital number, since it uses as much as digits as its factorization.

2147839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 34.

The square root of 2147839 is about 1465.5507497183. The cubic root of 2147839 is about 129.0230313624.

The spelling of 2147839 in words is "two million, one hundred forty-seven thousand, eight hundred thirty-nine".